74AHC594; 74AHCT594
8-bit shift register with output register
Rev. 01 — 4 July 2006
Product data sheet
1. General description
The 74AHC594; 74AHCT594 is a high-speed Si-gate CMOS device and is pin compatible
with Low-Power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard
No. 7A.
The 74AHC594; 74AHCT594 is an 8-bit, non-inverting, serial-in, parallel-out shift register
that feeds an 8-bit D-type storage register. Separate clocks (SHCP and STCP) and direct
overriding clears (SHR and STR) are provided on both the shift and storage registers.
A serial output (Q7S) is provided for cascading purposes.
Both the shift and storage register clocks are positive-edge triggered. If the user wishes to
connect both clocks together, the shift register will always be one count pulse ahead of the
storage register.
2. Features
s
s
s
s
s
s
Wide supply voltage range from 2.0 V to 5.5 V
8-bit serial-in, parallel-out shift register with storage
Independent direct overriding clears on shift and storage registers
Independent clocks for shift and storage registers
Latch-up performance exceeds 100 mA per JESD 78 Class II
Input levels:
x
CMOS levels: 74AHC594 only
x
TTL levels: 74AHCT594 only
s
ESD protection:
x
HBM JESD22-A114-C exceeds 2000 V
x
MM JESD22-A115-A exceeds 200 V
x
CDM JESD22-C101-C exceeds 1000 V
s
Specified from
−40 °C
to +85
°C
and from
−40 °C
to +125
°C
3. Applications
s
Serial-to parallel data conversion
s
Remote control holding register
Philips Semiconductors
74AHC594; 74AHCT594
8-bit shift register with output register
4. Ordering information
Table 1.
Ordering information
Package
Temperature
range
74AHC594D
74AHC594DB
74AHC594PW
74AHC594BQ
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
Name
SO16
SSOP16
TSSOP16
DHVQFN16
Description
plastic small outline package; 16 leads;
body width 3.9 mm
plastic shrink small outline package; 16 leads;
body width 5.3 mm
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
Version
SOT109-1
SOT338-1
SOT403-1
Type number
plastic dual in-line compatible thermal enhanced very SOT763-1
thin quad flat package; no leads; 16 terminals;
body 2.5
×
3.5
×
0.85 mm
plastic small outline package; 16 leads;
body width 3.9 mm
plastic shrink small outline package; 16 leads;
body width 5.3 mm
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
SOT109-1
SOT338-1
SOT403-1
74AHCT594D
74AHCT594DB
74AHCT594PW
74AHCT594BQ
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
SO16
SSOP16
TSSOP16
DHVQFN16
plastic dual in-line compatible thermal enhanced very SOT763-1
thin quad flat package; no leads; 16 terminals;
body 2.5
×
3.5
×
0.85 mm
5. Functional diagram
DS
SHCP
SHR
14
11
10
9
12
13
8-BIT STORAGE REGISTER
Q7S
8-STAGE SHIFT REGISTER
STCP
STR
15 1
2
3
4
5
6
7
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
mbc320
Fig 1. Functional diagram
74AHC_AHCT594_1
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 01 — 4 July 2006
2 of 29
Philips Semiconductors
74AHC594; 74AHCT594
8-bit shift register with output register
SHCP STCP
STR
11
12
9
15
1
2
DS
14
3
4
5
6
7
10
SHR
13
STR
mbc319
mbc322
13
12
10
11
14
R1 SRG8
C1/
1D
R2
C2
STCP
Q7S
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
DS
SHR
SHCP
2D
15
1
2
3
4
5
6
7
9
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q7S
Fig 2. Logic symbol
Fig 3. IEC logic symbol
STAGE 0
DS
D
Q
D
STAGES 1 TO 6
Q
STAGE 7
D
Q
Q7S
FFSH0
CP
R
SHCP
FFSH7
CP
R
SHR
D
Q
D
CP
Q
FFST0
CP
R
STCP
FFST7
R
STR
Q0
Q1 Q2 Q3 Q4 Q5 Q6
Q7
mbc321
Fig 4. Logic diagram
74AHC_AHCT594_1
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 01 — 4 July 2006
3 of 29
Philips Semiconductors
74AHC594; 74AHCT594
8-bit shift register with output register
SHCP
DS
STCP
SHR
STR
Q0
Q1
Q6
Q7
Q7S
mbc323
Fig 5. Timing diagram
6. Pinning information
6.1 Pinning
74AHC594
74AHCT594
Q1
Q2
Q3
Q4
Q5
Q6
Q7
GND
1
2
3
4
5
6
7
8
001aae343
16 V
CC
15 Q0
14 DS
13 STR
12 STCP
11 SHCP
10 SHR
9
Q7S
Fig 6. Pin configuration SO16
74AHC_AHCT594_1
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 01 — 4 July 2006
4 of 29
Philips Semiconductors
74AHC594; 74AHCT594
8-bit shift register with output register
74AHC594
74AHCT594
terminal 1
index area
Q2
2
3
4
5
6
7
8
GND
Q7S
9
GND
(1)
16 V
CC
15 Q0
14 DS
13 STR
12 STCP
11 SHCP
10 SHR
Q1
1
74AHC594
74AHCT594
Q1
Q2
Q3
Q4
Q5
Q6
Q7
GND
1
2
3
4
5
6
7
8
001aae344
Q3
Q4
Q5
16 V
CC
15 Q0
14 DS
13 STR
12 STCP
11 SHCP
10 SHR
9
Q7S
Q6
Q7
001aae345
Transparent top view
(1) The die substrate is attached to this pad using
conductive die attach material. It can not be used as
supply pin or input
Fig 7. Pin configuration TSSOP16
Fig 8. Pin configuration DHVQFN16
6.2 Pin description
Table 2.
Symbol
Q1
Q2
Q3
Q4
Q5
Q6
Q7
GND
Q7S
SHR
SHCP
STCP
STR
DS
Q0
V
CC
Pin description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Description
parallel data output Q1
parallel data output Q2
parallel data output Q3
parallel data output Q4
parallel data output Q5
parallel data output Q6
parallel data output Q7
ground (0 V)
serial data output Q7S
shift register reset SHR (active LOW)
shift register clock input SHCP
storage register clock input STCP
storage register reset STR (active LOW)
serial data input DS
parallel data output Q0
supply voltage
74AHC_AHCT594_1
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 01 — 4 July 2006
5 of 29
